Let's break this down. We're going to add 4154 and 44 together.

Step 1: We'll start by adding the digits 4 & 4 in column 1 and get 8.

Step 2: We'll start by adding the digits 5 & 4 in column 2 and get 9.

Step 3: We'll start by adding the digits 1 & 0 in column 3 and get 1.

Step 4: We'll start by adding the digits 4 & 0 in column 4 and get 4.

So, 4154 + 44 = 4198.

